From 2dc43e3f1b0bacee19a168aebe3ed282ea412006 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=81ron=20Ricardo=20Perez-Lopez?= <arpl@cs.stanford.edu>
Date: Tue, 8 Oct 2024 11:36:41 -0700
Subject: [PATCH] Fix processor core count calculation for Mac

---
 contrib/setup-bison.sh | 10 +++++++++-
 contrib/setup-flex.sh  | 10 +++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/contrib/setup-bison.sh b/contrib/setup-bison.sh
index 77d7d8223..49bd29f9c 100755
--- a/contrib/setup-bison.sh
+++ b/contrib/setup-bison.sh
@@ -20,6 +20,14 @@ if [ ! -f "$DEPS/bison-$VERSION.tar.xz" ]; then
     exit 1
 fi
 
+if [ "$(uname)" == "Darwin" ]; then
+    NUM_CORES=$(sysctl -n hw.logicalcpu)
+elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
+    NUM_CORES=$(nproc)
+else
+    NUM_CORES=1
+fi
+
 cd $DEPS
 tar -xf bison-$VERSION.tar.xz
 rm bison-$VERSION.tar.xz
@@ -27,7 +35,7 @@ mv ./bison-$VERSION ./bison
 cd bison
 mkdir bison-install
 ./configure --prefix $DEPS/bison/bison-install --exec-prefix $DEPS/bison/bison-install
-make -j$(nproc)
+make -j$NUM_CORES
 make install
 cd $DIR
 
diff --git a/contrib/setup-flex.sh b/contrib/setup-flex.sh
index df5e36153..303244f73 100755
--- a/contrib/setup-flex.sh
+++ b/contrib/setup-flex.sh
@@ -19,6 +19,14 @@ if [ ! -f "$DEPS/flex-2.6.4.tar.gz" ]; then
     exit 1
 fi
 
+if [ "$(uname)" == "Darwin" ]; then
+    NUM_CORES=$(sysctl -n hw.logicalcpu)
+elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
+    NUM_CORES=$(nproc)
+else
+    NUM_CORES=1
+fi
+
 # Set CFLAGS to work around compiler issue with building flex
 export CFLAGS="$CFLAGS -D_GNU_SOURCE"
 cd $DEPS
@@ -28,7 +36,7 @@ mv flex-2.6.4 flex
 cd flex
 mkdir flex-install
 ./configure --prefix $DEPS/flex/flex-install --exec-prefix $DEPS/flex/flex-install
-make -j$(nproc)
+make -j$NUM_CORES
 make install
 cd $DIR